Brendon Grylls is returning as parliamentary leader of the WA Nationals.

Mr Grylls, who quit the job three years ago, replaces Terry Redman who resigned without a vote being held.

He has thanked Mr Redman for his leadership and says the party resolved to have him as leader to pursue a new revenue raising strategy for WA that will see a tax increase for iron ore producers, BHP and Rio Tinto.

He spoke with Adam Shand.